Added configurable options for the Linker and Archiver.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6432 91177308-0d34-0410-b5e6-96231b3b80d8

Makefile.config

@@ -18,6 +18,16 @@ CXX = PATH=/usr/bin /usr/dcs/software/evaluation/bin/g++
 #
 CC := PATH=/usr/bin /usr/dcs/software/evaluation/bin/gcc
 
+#
+# Path to the linker.
+#
+LD = ld
+
+#
+# Path to the archiver program.
+#
+AR_PATH = ar
+
 #
 # The pathnames of the Flex and Bison programs, respectively.
 #